package com.itheima.service;

import com.alibaba.dubbo.config.annotation.Reference;
import com.itheima.pojo.Permission;
import com.itheima.pojo.Role;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.User;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Component;

import java.util.ArrayList;
import java.util.List;
import java.util.Set;

@Component
public class SpringSecurityUserService implements UserDetailsService {

    @Reference
    private UserService userService;
    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        //通过用户名获得用户信息
        com.itheima.pojo.User user = userService.findByUsername(username);
        //判断用户不为空
        if(user == null){
            //为空返回空值
            return null;
        }
        //将用户信息返回给框架
        List<GrantedAuthority> list = new ArrayList<>();
        //获得用户角色信息
        Set<Role> roles = user.getRoles();
        //遍历用户角色信息
        for (Role role : roles) {
            //授予角色
            list.add(new SimpleGrantedAuthority(role.getKeyword()));
            Set<Permission> permissions = role.getPermissions();
            //遍历权限信息
            for (Permission permission : permissions) {
                //授予权限
                list.add(new SimpleGrantedAuthority(permission.getKeyword()));
            }
        }
        UserDetails userDetails = new User(username,user.getPassword(),list);

        return userDetails;
    }
}
